No illnesses have been reported in dogs, but so far 16 cases of salmonella in humans have been found in nine states and Canada, according to the Centers for Disease Control and Prevention (CDC). Affected humans may have caught salmonella from handling the dry dog food and then handling their own food, or from cross contamination with utensils. The CDC is still investigating the outbreak.

Additional recalls have been issued by dog food brands that aren’t owned by Diamond Pet Food, but are manufactured at the Gaston facility, expanding the count of affected states even further. Wellness Brands is recalling one recipe, of 15-pound bags, 30-pound bags, and 5-ounce sample bags of Wellness Complete Health Super5Mix Large Breed Puppy food, with best by dates of Jan. 9, 2013, through Jan. 11, 2013.

Solid Gold has issued is own recall of all sized bags of two of its recipes: Solid Gold WolfKing Large Breed Adult Food, and Solid Gold WolfCub Large Breed Puppy Food. Both recipes have a December 30, 2012, “Best before” date.

And Natural Balance is recalling batches of five dry dog food recipes manufactured at the South Carolina plant sold in 5-pound, 15-pound, and 28-pound bags: Sweet Potato and Venison, Lamb Meal and Brown Rice, Sweet Potato and Bison, Vegetarian, and lamb meal and brown rice small breed bites. Affected bags have “Best by” dates between December 2012 and March 2013. The Natural Balance recall affects food sold in 39 states. If you’re still counting, that’s all of them except Alaska, Arizona, California, Hawaii, Idaho, Montana, New Mexico, Nevada, Oregon, Utah, and Washington.

Online retail giant Amazon has issued a statement in the "Pet supplies section of their website, saying that the site has stopped offering pet food products that have been recalled by their manufacturers. Amazon “will not offer affected products until we can confirm that our inventory does not contain any recalled batches,” according to the statement.

In total, 11 brands of dog food are implicated in the Diamond Pet Foods recall according to the company's website, including:

Chicken Soup for the Pet Lover’s Soul

Country Value

Diamond

Diamond Naturals

Premium Edge

Professional

4 Health

Taste of the Wild

Apex

Kirkland Signature/Kirkland’s Signature Nature’s Domain

Canidae

To figure out whether you have a recalled bag of food, check the 12-digit production code on the back of the package. Affected bags have a “2” or a “3” in the 9th
digit place, and an “X” in either the 10th
or 11th
digit place. The FDA’s example: FDE0204R 2X TS. Also check the “Best before” date, which ranges from Dec. 9, 2012, and April 7, 2013, on affected bags of food.

More detailed recall information for the specific affected brands can be found at diamondpetrecall.com. Customers who want a replacement or a refund should call Diamond Pet Foods at 866-918-8756 between 8 a.m. and 6 p.m. Eastern Time.